guloader | 3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586

General

Target

3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe
Size

431KB
MD5

3035773a6fd96df3c95f7b3c966cc204
SHA1

8edaa8a7551b35e08e4ba8574a29440023813e85
SHA256

3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586
SHA512

1fbb1e59e9999bed11f15dace727c745fa788f0d26cf887b924670eead5b1ece5a6ed9c8702f0d83c71734fefd95893bf06fbdb3cb6b52e777ca4ae2c7fa40e7
SSDEEP

12288:AgGlyn9K5Fy1sDLwdr0jD2O7yvZ4Gl1Wb6:AgEUc58sfPjdGuUWb6

Score

10^/10

guloader remcos grace&success discovery downloader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

GRACE&SUCCESS

C2

eweo9264gtuiort.duckdns.org:22740

eweo9264gtuiort.duckdns.org:35966

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
false
keylog_crypt
false
keylog_file
great.dat
keylog_flag
false
keylog_folder
great
mouse_option
false
mutex
Rmc-GEOGQB
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Loads dropped DLL 2 IoCs

pid	Process
2292	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe
2292	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Genoptrykkes = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Anodise\\Indprentede173.exe"	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
22	drive.google.com
23	drive.google.com

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\leiotrichine.cra	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2000	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2292	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe
2000	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2292 set thread context of 2000	2292	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe	89

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\unneutralize.Exe	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe
File opened for modification	C:\Program Files (x86)\Common Files\Indhak.non	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\inspicalr\casimeres.ini	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2292	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2000	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2292 wrote to memory of 2000	2292	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe	89
PID 2292 wrote to memory of 2000	2292	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe	89
PID 2292 wrote to memory of 2000	2292	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe	89
PID 2292 wrote to memory of 2000	2292	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe	89
PID 2292 wrote to memory of 2000	2292	3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe	89

C:\Users\Admin\AppData\Local\Temp\3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe
"C:\Users\Admin\AppData\Local\Temp\3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2292
- C:\Users\Admin\AppData\Local\Temp\3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe
  "C:\Users\Admin\AppData\Local\Temp\3651fbb3c17ca4bc7590476dad23c1fbd773bc3595313d87ac23eff91c203586.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2000

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsw7C66.tmp\System.dll

Filesize
12KB

MD5
564bb0373067e1785cba7e4c24aab4bf

SHA1
7c9416a01d821b10b2eef97b80899d24014d6fc1

SHA256
7a9ddee34562cd3703f1502b5c70e99cd5bba15de2b6845a3555033d7f6cb2a5

SHA512
22c61a323cb9293d7ec5c7e7e60674d0e2f7b29d55be25eb3c128ea2cd7440a1400cee17c43896b996278007c0d247f331a9b8964e3a40a0eb1404a9596c4472

Download Submit
memory/2000-42-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/2000-43-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/2000-16-0x00000000016F0000-0x0000000004EE9000-memory.dmp

Filesize
56.0MB

Download
memory/2000-51-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/2000-18-0x0000000077648000-0x0000000077649000-memory.dmp

Filesize
4KB

Download
memory/2000-19-0x00000000775C1000-0x00000000776E1000-memory.dmp

Filesize
1.1MB

Download
memory/2000-30-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/2000-34-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/2000-50-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/2000-38-0x00000000775C1000-0x00000000776E1000-memory.dmp

Filesize
1.1MB

Download
memory/2000-17-0x00000000775C1000-0x00000000776E1000-memory.dmp

Filesize
1.1MB

Download
memory/2000-44-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/2000-45-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/2000-46-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/2000-47-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/2000-48-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/2000-49-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/2292-15-0x0000000074215000-0x0000000074216000-memory.dmp

Filesize
4KB

Download
memory/2292-14-0x00000000775C1000-0x00000000776E1000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads